+ wip ; ok verify future sk

src/signatures.ml

@@ -157,6 +157,9 @@ end) : sig
 
   val sign_f : f:(string -> eddsa_sig) -> r -> t
 
+  (* TODO
+     - just directly verify here?
+     - type for `theirs` and `ours` signatures? *)
   val verify_f :
     f:(eddsa_sig -> msg:string -> (unit, string) result) ->
     t ->